Do you trust a Pressure Gauge or TPMS reading more?

[RobWNY]

I filled all four of my RV tires using my Viair 400P using the included tire inflation gun w/gauge to 80 PSI. When my EEZTire TPMS connected to each tire pressure reading, they were a little different. The 4 tires read 74psi,76psi,77psi and 77psi. When I checked them with a certified ANSI accurate gauge, two tires read 78 PSI, one read 80 psi and one read 77 psi. So which readings should I trust? I realize a couple of psi one way or the other doesn't make that much difference but I'd like to have one gauge that I semi-trust.

Sorry I thought I was putting this in the regular General Discussion. Mods, please move this if you feel it should be someplace else.